LED (Light Emitting Diode), light-emitting diode, is mainly composed of five materials: bracket, silver glue, wafer, gold wire and epoxy resin. LED (Light-Emitting-Diode in Chinese means light-emitting diode) is a semiconductor that can convert electrical energy into light energy. It changes the principle of incandescent lamp tungsten filament light emission and energy-saving lamp three-color toner light emission, and uses electric field light emission. According to the analysis, the characteristics of LEDs are very clear. The pictures of LED bulbs and lamps (19 photos) are obvious, with long life, high light efficiency, low radiation and low power consumption.
The spectrum of white LEDs is almost entirely concentrated in the visible light band, and its luminous efficiency can exceed 150lm / W (2010). Comparing LEDs with ordinary incandescent lamps, spiral energy-saving lamps and T5 three-color fluorescent lamps, the results show that: ordinary incandescent lamps have a light efficiency of 12lm / W and a life of less than 2000 hours, and spiral energy-saving lamps have a light efficiency of 60lm / W and a life of less 8000 hours, T5 fluorescent lamp is 96lm / W, life expectancy is about 10000 hours, and the white LED light diameter of 5 mm in diameter can theoretically exceed 150lm / W, life expectancy can be greater than 100,000 hours. Some people also predict that the upper limit of LED life in the future will be infinite. However, the working principle of LED lights makes the problem of heat dissipation in the high-power LED lighting industry very prominent.
The brightness of the LED is inevitable related to the light emitting angle of the LED. The smaller the angle of the LED, the higher the brightness. There is nothing super-bright or super-bright, it is a kid, if it is a good quality LED, no matter which one The brightness of everyone produced by LED manufacturers is similar, but the production process is different, and the service life is slightly different, because everyone uses those foreign LED chips. If it is a 5MM LED 180 degrees angle white light, the luminous intensity is only Hundreds of MCDs, if it is a 15-degree light intensity, it will go to more than 10,000 or 20,000 MCDs, and the light intensity is dozens of times different.If it is used for lighting, it is best to use high power outdoors LED, the brightness is higher, a single power has 1W, 3W, 5W, and there are multiple high-power combined into a high-power LED, the power goes to hundreds of. Color temperature and brightness are okay, and the brightness and Lumen value.